class FakeMath {
  static PI = 22 / 7
  static #totallyRandomNumber = 4

  static #computeRandomNumber() {
    return FakeMath.#totallyRandomNumber
  }

  static random() {
    console.log('I heard you like random numbers…')
    return FakeMath.#computeRandomNumber()
  }
}

FakeMath.PI // 3.142857142857143
FakeMath.random()
// I heard you like random numbers…
// 4
FakeMath.#totallyRandomNumber // 报错
FakeMath.#computeRandomNumber() // 报错
module.exports = FakeMath
